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US 11,309,473 B2Granted
Light emitting platform (LEP) with phononic structured nanowires
OwnerWilliam N. Carrinventor
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Abstract
A semiconductor-based light emitting platform (LEP) comprising a heated blackbody radiator wherein the light emitting platform is thermally isolated by nanowires having ultra-low thermal conductivity. In embodiments, the pixel is structured for broadband emission with a platform comprising an infrared surface structured for high emissivity within a broadband wavelength range. In other embodiments radiation is confined to a limited bandwidth by metamaterial and other resonant filters. In embodiments, the internal efficiency of the LEP configured for broadband operation can be higher compared with an LED.
Claims21
A light emitting platform (LEP) comprising:
- a first substrate having a cavity;
- a plurality of nanowires, wherein the nanowires are physically coupled to a microplatform and the first substrate, the nanowires thereby suspending the microplatform in the cavity;
- wherein the microplatform comprises:
- (h) a thermal element and a photonic element;
- (i) the photonic element comprises a material or device of increased emissivity for light within a wavelength range;
- (j) the thermal element comprises an electric resistive element for heating the microplatform;
- (k) at least one of the nanowires comprises a phononic element;
- (l) the phononic element includes a crystalline semiconductor first layer comprising structure that reduces a thermal conductivity of the first layer;
- (m) the phononic element increases a ratio of electrical conductivity to thermal conductivity of the nanowire;
- and
- the LEP is physically configured for application as a photonic thermal emitter.
8 more elements
Dependencies are inferred from the claim text.